Hello,
Regarding the login url, I can add an option to enter a login page. If the login page is set, then it will override the default login url. In the mean time, you can use the templating system to override the login text. The template shown is in wp-content/plugins/wallets-tips/templates/login.php.
Regarding the QR code feature, like I said earlier, I decided against it. While I do appreciate people sending in suggestions, this does not mean that I always implement them, or that I implement them within a specific time-frame. If you decide to hire a developer to implement the features you require, I can guide them through.
with regards